Dark mode for Apple Mail. Dimmd darkens the HTML emails that never got the dark-mode memo — no more white flashbangs in a dark inbox.
Coming soon to the Mac App StoreThis newsletter hard-codes a white background, so it glares at you no matter how dark the rest of your Mac is.
Shop nowSame email, quietly restyled at decode time — dark canvas, readable text and links, images untouched.
Shop nowA MailKit extension, not another email client. Your accounts, rules, and archive stay exactly where they are.
Everything happens locally, inside Mail's sandbox. Dimmd has no network access — your email never goes anywhere.
Messages that already support dark mode are left alone, signed and encrypted mail is never touched, and light mode is never affected.
Apple Mail supports emails that declare dark-mode styles — but most marketing emails never do, so they render blinding white. Dimmd hooks into Mail's message decoding and injects the missing styles, gated behind the system's dark-mode media query. Choose between two looks: Forced colors (a clean dark canvas with readable text) or Smart invert (preserves the email's original design).
One-time purchase. No subscription, no account, no nonsense.
Effective 14 July 2026
Dimmd processes your email entirely on your Mac. When Apple Mail displays a message, the Dimmd extension restyles the message's HTML locally, inside Mail's sandbox, and hands it straight back to Mail.
Dimmd collects no data. It has no servers, no analytics, no trackers, and no network access of any kind — the app's sandbox does not permit outbound connections. The content of your email is never stored, transmitted, or shared with anyone, including us.
The only information Dimmd keeps is your own settings (on/off and darkening style), stored locally on your Mac.
Questions? Email spacedawwwg@gmail.com.